lstate.h
资源名称:wow.rar [点击查看]
上传用户:jxpjxmjjw
上传日期:2009-12-07
资源大小:5877k
文件大小:5k
源码类别:
模拟服务器
开发平台:
Visual C++
- /*
- ** $Id: lstate.h,v 1.1 2004/08/20 02:26:56 JH Exp $
- ** Global State
- ** See Copyright Notice in lua.h
- */
- #ifndef lstate_h
- #define lstate_h
- #include "lua.h"
- #include "lobject.h"
- #include "ltm.h"
- #include "lzio.h"
- /*
- ** macros for thread synchronization inside Lua core machine:
- ** all accesses to the global state and to global objects are synchronized.
- ** Because threads can read the stack of other threads
- ** (when running garbage collection),
- ** a thread must also synchronize any write-access to its own stack.
- ** Unsynchronized accesses are allowed only when reading its own stack,
- ** or when reading immutable fields from global objects
- ** (such as string values and udata values).
- */
- #ifndef lua_lock
- #define lua_lock(L) ((void) 0)
- #endif
- #ifndef lua_unlock
- #define lua_unlock(L) ((void) 0)
- #endif
- #ifndef lua_userstateopen
- #define lua_userstateopen(l)
- #endif
- struct lua_longjmp; /* defined in ldo.c */
- /* default meta table (both for tables and udata) */
- #define defaultmeta(L) (&G(L)->_defaultmeta)
- /* table of globals */
- #define gt(L) (&L->_gt)
- /* registry */
- #define registry(L) (&G(L)->_registry)
- /* extra stack space to handle TM calls and some other extras */
- #define EXTRA_STACK 5
- #define BASIC_CI_SIZE 8
- #define BASIC_STACK_SIZE (2*LUA_MINSTACK)
- typedef struct stringtable {
- GCObject **hash;
- ls_nstr nuse; /* number of elements */
- int size;
- } stringtable;
- /*
- ** informations about a call
- */
- typedef struct CallInfo {
- StkId base; /* base for called function */
- StkId top; /* top for this function */
- int state; /* bit fields; see below */
- union {
- struct { /* for Lua functions */
- const Instruction *savedpc;
- const Instruction **pc; /* points to `pc' variable in `luaV_execute' */
- int tailcalls; /* number of tail calls lost under this entry */
- } l;
- struct { /* for C functions */
- int dummy; /* just to avoid an empty struct */
- } c;
- } u;
- } CallInfo;
- /*
- ** bit fields for `CallInfo.state'
- */
- #define CI_C (1<<0) /* 1 if function is a C function */
- /* 1 if (Lua) function has an active `luaV_execute' running it */
- #define CI_HASFRAME (1<<1)
- /* 1 if Lua function is calling another Lua function (and therefore its
- `pc' is being used by the other, and therefore CI_SAVEDPC is 1 too) */
- #define CI_CALLING (1<<2)
- #define CI_SAVEDPC (1<<3) /* 1 if `savedpc' is updated */
- #define CI_YIELD (1<<4) /* 1 if thread is suspended */
- #define ci_func(ci) (clvalue((ci)->base - 1))
- /*
- ** `global state', shared by all threads of this state
- */
- typedef struct global_State {
- stringtable strt; /* hash table for strings */
- GCObject *rootgc; /* list of (almost) all collectable objects */
- GCObject *rootudata; /* (separated) list of all userdata */
- GCObject *tmudata; /* list of userdata to be GC */
- Mbuffer buff; /* temporary buffer for string concatentation */
- lu_mem GCthreshold;
- lu_mem nblocks; /* number of `bytes' currently allocated */
- lua_CFunction panic; /* to be called in unprotected errors */
- TObject _registry;
- TObject _defaultmeta;
- struct lua_State *mainthread;
- Node dummynode[1]; /* common node array for all empty tables */
- TString *tmname[TM_N]; /* array with tag-method names */
- } global_State;
- /*
- ** `per thread' state
- */
- struct lua_State {
- CommonHeader;
- StkId top; /* first free slot in the stack */
- StkId base; /* base of current function */
- global_State *l_G;
- CallInfo *ci; /* call info for current function */
- StkId stack_last; /* last free slot in the stack */
- StkId stack; /* stack base */
- int stacksize;
- CallInfo *end_ci; /* points after end of ci array*/
- CallInfo *base_ci; /* array of CallInfo's */
- unsigned short size_ci; /* size of array `base_ci' */
- unsigned short nCcalls; /* number of nested C calls */
- lu_byte hookmask;
- lu_byte allowhook;
- lu_byte hookinit;
- int basehookcount;
- int hookcount;
- lua_Hook hook;
- TObject _gt; /* table of globals */
- GCObject *openupval; /* list of open upvalues in this stack */
- GCObject *gclist;
- struct lua_longjmp *errorJmp; /* current error recover point */
- ptrdiff_t errfunc; /* current error handling function (stack index) */
- };
- #define G(L) (L->l_G)
- /*
- ** Union of all collectable objects
- */
- union GCObject {
- GCheader gch;
- union TString ts;
- union Udata u;
- union Closure cl;
- struct Table h;
- struct Proto p;
- struct UpVal uv;
- struct lua_State th; /* thread */
- };
- /* macros to convert a GCObject into a specific value */
- #define gcotots(o) check_exp((o)->gch.tt == LUA_TSTRING, &((o)->ts))
- #define gcotou(o) check_exp((o)->gch.tt == LUA_TUSERDATA, &((o)->u))
- #define gcotocl(o) check_exp((o)->gch.tt == LUA_TFUNCTION, &((o)->cl))
- #define gcotoh(o) check_exp((o)->gch.tt == LUA_TTABLE, &((o)->h))
- #define gcotop(o) check_exp((o)->gch.tt == LUA_TPROTO, &((o)->p))
- #define gcotouv(o) check_exp((o)->gch.tt == LUA_TUPVAL, &((o)->uv))
- #define ngcotouv(o)
- check_exp((o) == NULL || (o)->gch.tt == LUA_TUPVAL, &((o)->uv))
- #define gcototh(o) check_exp((o)->gch.tt == LUA_TTHREAD, &((o)->th))
- /* macro to convert any value into a GCObject */
- #define valtogco(v) (cast(GCObject *, (v)))
- lua_State *luaE_newthread (lua_State *L);
- void luaE_freethread (lua_State *L, lua_State *L1);
- #endif